CN210031702U - Down-the-hole type upstream water stop accident access door anti-water injection door head - Google Patents
Down-the-hole type upstream water stop accident access door anti-water injection door head Download PDFInfo
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- CN210031702U CN210031702U CN201920320844.2U CN201920320844U CN210031702U CN 210031702 U CN210031702 U CN 210031702U CN 201920320844 U CN201920320844 U CN 201920320844U CN 210031702 U CN210031702 U CN 210031702U
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Abstract
The utility model relates to a hydraulic and hydroelectric engineering technical field especially relates to a down-the-hole type upper reaches stagnant water accident access door prevents penetrating water lintel. The door head of the utility model is fixed at the bottom end of the upstream breast wall; the door head comprises a door head panel, a water injection preventing plate and a water stop seat plate; the door lintel panel and the water injection preventing plate are welded at an acute angle, and one end part of the water injection preventing plate extends out of the door lintel panel; the part of the water injection preventing plate, which extends out of the door lintel panel, extends into the door groove; or the water injection preventing plate is welded at the lower part of the door lintel panel; the water stop seat plate is welded at the lower part of the door lintel panel. The utility model discloses can reduce the door body vibration of accident access door closing door in-process, reduce the door slot and the near regional pulsating pressure intensity of mesopore runner, improve mesopore runner flow state, novel structure, compact structure, make simple to operate, with low costs.
Description
Technical Field
The utility model relates to a hydraulic and hydroelectric engineering technical field especially relates to a down-the-hole type upper reaches stagnant water accident access door prevents penetrating water lintel.
Background
Flood discharge center holes (or called deep holes, see figure 1) of large hydropower station dams are generally provided with down-the-hole type upstream water stop accident access doors at the center hole inlets, and the access doors are operated by dam top door machines. The outlet is provided with an arc-shaped working gate which is operated by a hydraulic hoist. Under the normal condition, the arc-shaped working gate is operated by a hydraulic hoist to open and discharge flood, and is closed by the hydraulic hoist after the flood discharge is finished. If the arc-shaped working door is in an accident in the opening or closing process and cannot be normally opened or closed, the inlet accident inspection door is required to be operated by the gate machine at the top of the dam to close the water gate to cut off water flow, and conditions are created for inspecting the arc-shaped working gate and the hydraulic hoist. In the process of closing the door of the accident access door, the problem of insufficient air supply of the door slot is particularly prominent, so that the violent vibration of the gate is easily caused, and the operation safety of the accident access door is influenced to a certain extent.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned problem that prior art exists, provide a down-the-hole type upper reaches stagnant water accident access door prevents penetrating lintel. The utility model discloses can reduce the door body vibration of accident access door closing door in-process, improve mesopore runner flow state, make simple to operate.
As shown in fig. 2, in the emergency access door with water stop arranged at the upstream side, the result of a hydraulics test shows that in the process that the down-the-hole type upstream water stop emergency access door enters the opening from the bottom edge of the gate to the gate is completely closed, a large amount of high-pressure water in the middle hole flow passage passes through the top of the door from a gap (with the width of about 100mm) between the upstream panel and the upstream breast wall of the emergency access door and then diffuses and splashes, so that an air supply passage between the downstream panel and the gate groove of the emergency access door is blocked, and the downstream air supply of the emergency access door is. Because the middle hole flow passage is insufficient in air supply in the door closing process, an extremely unstable negative pressure cavity area B can be formed in the top area of the downstream flow passage of the accident access door, and the pulsating pressure intensity near the negative pressure cavity area is high; and because the jet flow water flow velocity is extremely high, an instantaneous negative pressure area A area can appear near an upstream panel of the accident access door, and the area is accompanied with the appearance of transverse axis vortexes. The negative pressure condition formed by the jet flow and the impact of the water body in the door closing process seriously influences the operation safety of the door body and the door slot and the movable water door closing of the accident access door.
As shown in fig. 3, in order to solve the problem of insufficient air supply of the gate slot in the closing process of the emergency access door, in the actual process of the existing engineering, a vent pipe with the diameter of 2-3 m is arranged at the position of the top of the gate slot 2m left and right at the downstream of the emergency access door, so that a region B of the top of a flow channel of a flood discharge orifice is provided with a smooth ventilation channel, and the flow state of the flood discharge orifice and the pressure characteristic near the gate slot region are improved. However, a certain gap still exists between the accident access door and the upstream breast wall, so that the water body can still cross the door top and flow downstream and the flow velocity of the water flow is high in the door closing process, so that the region A of the upstream panel part of the accident access door still has instantaneous extreme value negative pressure, and the downstream panel and the bottom edge are sealed by the water curtain at the moment, so that ventilation cannot be performed, the maintenance time of the extreme value negative pressure is long, and the accident access door is influenced to be closed smoothly.
A down-the-hole type upstream water stop accident access door anti-water-jet door head is characterized in that: the door lintel is arranged at the bottom end of the upstream breast wall; the door head comprises a door head panel, a water injection preventing plate and a water stop seat plate; the door lintel panel and the water injection preventing plate are welded at an acute angle, and one end part of the water injection preventing plate extends out of the door lintel panel; the part of the water injection preventing plate, which extends out of the door lintel panel, extends into the door groove; or the water injection preventing plate is welded at the lower part of the door lintel panel; the water stop seat plate is welded at the lower part of the door lintel panel.
Furthermore, the panel cross beam is vertically welded on the door lintel panel; the door lintel panel, the water injection preventing plate and the panel cross beam are connected into a whole by the rib plates through three-side welding; or the rib plate connects the door lintel panel, the bottom plate and the panel beam into a whole by three-side welding.
Furthermore, a water-jet-proof reinforcing plate is arranged between the door lintel panel and the water-jet-proof plate.
Furthermore, a gap between the top end of the water jet preventing plate and the accident access door is reserved by about 2 cm.
The utility model provides a down-the-hole type upper reaches stagnant water accident access door prevents penetrating water lintel, prevents penetrating the water board and weld as an organic whole with the lintel panel, prevents penetrating the water board and bear high-speed rivers impact load as upper reaches breastwork angle bead to do simultaneously and prevent penetrating the water structure and prevent water directive door top, the utility model discloses simple structure, wholeness are good. The beneficial effects of the utility model reside in that:
1. the door head panel of the utility model is mainly used for installing the water stop seat board and is used as a guide structure for the water stop falling position of the entrance of the accident access door and the top of the accident access door; the water injection preventing plate is used for preventing high-pressure water in the flow channel from being upwards sprayed from a gap between the door head panel and the accident access door upstream panel in the door closing process of the accident access door and bearing high-speed water flow impact load borne by the door head structure; the water-jet-proof reinforcing plate is welded with the water-jet-proof plate in an overlapping manner and is used for reinforcing the structural strength of the water-jet-proof plate; the water stop seat plate is used as a top water stop rubber support seat of the emergency access door, and the emergency access door is tightly attached to the top water stop rubber to realize water tightness after being closed; the panel cross beam and the rib plate are welded with the water injection preventing plate and the door lintel panel to fixedly integrate the door lintel structure into a whole, so as to enhance the strength and rigidity of the whole structure of the door lintel;
2. the additional arrangement of the anti-water-injection door head can reduce the door body vibration in the door closing process of the accident access door, reduce the pulsating pressure intensity of the door groove and the area near the flow channel, improve the flow state of the middle hole flow channel and has better effect than the additional arrangement of the vent pipe;
3. the installation area of the anti-water-injection door lintel is only the local position of the bottom end of the upstream breast wall, and compared with the installation range of the vent pipe directly communicated to the dam top, the manufacturing and installation processes are simple;
4. the anti-water-injection door lintel is made of less materials, and the economic cost is lower than that of a breather pipe.
Drawings
Fig. 1 is a cross-sectional view of a center hole in a dam flood discharge, and the direction of a horizontal arrow is the flow direction.
Fig. 2 is a schematic diagram of the closing process of the access door for the upstream water stop accident without a down-the-hole type vent hole, wherein the direction of a horizontal arrow is the flow direction, and the direction of a vertical arrow is the air supplement direction.
Fig. 3 is a schematic diagram of the process of closing the emergency access door under the condition of additionally arranging the vent pipe, wherein the direction of a horizontal arrow is the flow direction, and the direction of a vertical arrow is the air replenishing direction.
Fig. 4 is addding the utility model discloses a door process schematic diagram is closed to accident access door under the structural condition, and horizontal arrow point direction is the flow direction, and perpendicular arrow point direction is the tonifying qi direction.
Fig. 5a is a schematic cross-sectional view of a structure according to a first embodiment of the present invention.
Fig. 5b is a schematic cross-sectional view of a second embodiment of the present invention.
Fig. 6 is a schematic front view of the present invention.
In the figure: 1-accident access door, 2-dam top door machine, 3-arc working gate, 4-hydraulic hoist, 5-gate groove, 6-upstream breast wall, 7-air supply channel, 8-mesopore flow channel, 9-vent pipe, 10-anti-water-jet door head, 1.1-accident access door top water, 10.1-door head panel, 10.2-water-stop seat plate, 10.3-anti-water-jet reinforcing plate, 10.4-anti-water-jet plate, 10.5-panel cross beam, 10.6-rib plate and 10.7-bottom plate.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, but they are not to be construed as limiting the invention, and are presented by way of example only, and the advantages of the invention will become more apparent and can be easily understood by description.
Referring to fig. 5a and 6, the first embodiment of the utility model discloses a down-the-hole type upstream water stop accident access door anti-water-jet door lintel, which comprises a door lintel panel 10.1, a water stop seat plate 10.2, an anti-water-jet reinforcing plate 10.3, an anti-water-jet plate 10.4, a panel beam 10.5 and a rib plate 10.6; the door lintel panel 10.1 and the water-injection-preventing reinforcing plate 10.3 are welded at an acute angle and are welded in a top connection mode; the water-jet-proof reinforcing plate 10.3 and the water-jet-proof plate 10.4 are overlapped and welded into a whole; the panel cross beam 10.5 is vertically arranged on the back surface of the lintel panel 10.1, and the panel cross beam 10.5 is in butt welding with the lintel panel 10.1; the rib plate 10.6 is fixedly connected with the door lintel panel 10.1, the water injection preventing plate 10.4 and the panel cross beam 10.5 into a whole through three-side welding; the water stop seat board 10.2 is welded on the door lintel panel 10.1 in an attaching mode.
This embodiment also preferably has the lintel panel 10.1 and the water jet board 10.4 top welded together at an acute angle.
The door lintel panel 10.1 and the water injection preventing plate 10.4 are used as main structures of the door lintel 10, and the door lintel panel 10.1 is also used as a guide structure for the accident access door 1 to enter the door groove 5 and for the top water stop 1.1 of the accident access door to fall. One end part of the water injection preventing plate 10.4 extends out of the door lintel panel 10.1 and extends into the door groove 5, the extending part is used as a water injection preventing structure, and the length of the part of the water injection preventing plate 10.4 extending out of the door lintel panel 10.1 is determined according to the gap between the upstream breast wall 6 and the accident access door 1.
The water-stopping seat board 10.2 is arranged on the surface of the door lintel panel 10.1, and the installation position of the water-stopping seat board 10.2 is determined according to the position of water stopping 1.1 on the top of the accident access door.
The water-jet-proof reinforcing plate 10.3 is mainly used for increasing the structural strength of the water-jet-proof reinforcing plate 10.4 and preventing the structural damage of the water-jet-proof reinforcing plate under the action of high-speed water flow scouring and high water head, and the water-jet-proof reinforcing plate 10.3 can be determined to be arranged or not according to specific load condition requirements. When the water-jet preventing reinforcing plate 10.3 is not arranged, the door lintel panel 10.1 and the water-jet preventing plate 10.4 are butted and welded together at a certain angle, and the water-jet preventing plate 10.4 and the door lintel panel 10.1 are butted and welded into a structure similar to an asymmetric T shape.
The panel cross beam 10.5 is vertically arranged on the back surface of the door lintel panel 10.1, the panel cross beam 10.5 is in butt joint welding with the door lintel panel 10.1, the panel cross beam 10.5 is mainly used for enhancing the structural strength and rigidity of the door lintel panel 10.1, and the arrangement interval and the structural size are determined according to the uplifting pressure born by the door lintel panel 10.1.
The second embodiment of the utility model discloses a refer to fig. 5b, the stagnant water bedplate 10.2 lower part of water injection prevention board 10.4 welding on lintel panel 10.1, lintel panel 10.1 welds with bottom plate 10.7 acutangular angle, panel crossbeam 10.5 is arranged perpendicularly at the lintel panel 10.1 back, gusset 10.6 fuses lintel panel 10.1, bottom plate 10.7, panel crossbeam 10.5 through trilateral welding.
The utility model discloses a welded structure spare, other connection methods do not constitute the utility model discloses a limit.
Referring to fig. 4, the anti-water-injection door lintel 10 of the utility model is installed at the bottom end of the upstream breast wall 6 according to the arrangement requirement of the accident access door top water stop 1.1; the face plate 10.1 of the door lintel 10 faces one side of the door slot 5, the upper part of the face plate 10.1 of the door lintel is connected with the first-stage concrete of the upstream breast wall 6, the lower part of the face plate is provided with a water stop seat plate 10.2, and the surface direction of the face plate 10.1 of the door lintel is consistent with the opening and closing running direction of the accident access door 1; the bottom surface of an anti-water-injection plate 10.4 of the door lintel 10 is level with the top surface of an inlet of the flow channel 8, the front end of the anti-water-injection plate 10.4 extends out of a door lintel panel 10.1, part of the anti-water-injection plate extends into a door groove 5 of the down-the-hole type upstream water-stopping accident inspection door 1, and the part extending into the door groove 5 is used as an anti-water-injection structure.
The bottom edge of down-the-hole type upper reaches stagnant water accident access door 1 begin to get into in the mesopore runner 8 until accident access door 1 closes and accomplishes whole in-process, this utility model discloses a gap between door lintel 10 prevents the board 10.4 top of penetrating and the 1 upstream panel of accident access door is controlled at 2cm always, less gap can a large amount of water of shutoff penetrate from 1 upstream panel of accident access door and upper reaches breastwork 6, it is unblocked to ensure the tonifying qi passageway 7 between accident access door low reaches panel and the gate slot 5, eliminate accident access door vibration phenomenon that the extreme negative pressure caused in accident access door upper reaches panel subregion basically, effectively improve mesopore runner 8 flow state, reduce gate slot 5 and mesopore runner 8 pulsating pressure intensity.
The utility model discloses can produce apparent economic effect. Calculating by taking a water retaining head of a down-the-hole type upstream water stopping accident access door of 80m (difference between a normal water storage level and a sill elevation), a diameter of a vent pipe of 2m and 10 flood discharge mesopore orifices (in the existing engineering, a Wudongde hydropower station is provided with 6 flood discharge mesopores, and a three gorge hydropower junction is provided with 22 flood discharge mesopores, so that 10 pores and 6m multiplied by 8m of orifice sizes are taken as compromise values of most engineering) as an example:
1) by adopting the anti-water-injection door lintel, the single hole increases the engineering quantity by about 0.5t, the manufacturing and installation cost per ton is about 1.5 ten thousand yuan, and the total cost of 10 holes is 10 multiplied by 0.5 multiplied by 1.5 which is 7.5 ten thousand;
2) the length of the vent pipe is 100m, the single-hole engineering amount is about 60t, the manufacturing and installation cost per ton is about 1.5 ten thousand yuan, and the total cost of 10 holes is 10 multiplied by 60 multiplied by 1.5 which is 900 ten thousand. The direct economic cost of the ventilation pipe structure is 26 times of that of the anti-water-injection door lintel structure, the installation period of the ventilation pipe structure is long, the installation difficulty is high, and the indirect economic cost is higher than that of the installation of the anti-water-injection door lintel structure.
The parts of the present invention not specifically described are the parts known to those skilled in the art or the ordinary skilled in the art. The above description is only a preferred example of the present invention, and is not intended to limit the present invention, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (4)
1. The down-the-hole type upstream water stop accident access door prevents penetrating the water door lintel, its characteristic is: the door lintel (10) is arranged at the bottom end of the upstream breast wall (6); the door lintel (10) comprises a door lintel panel (10.1), a water injection preventing plate (10.4) and a water stop seat plate (10.2); the door lintel panel (10.1) and the water injection preventing plate (10.4) are welded at an acute angle, and one end part of the water injection preventing plate (10.4) extends out of the door lintel panel (10.1); the part of the water injection preventing plate (10.4) extending out of the door lintel panel (10.1) extends into the door groove (5); or the water injection preventing plate (10.4) is welded at the lower part of the door lintel panel (10.1); the water stop seat plate (10.2) is welded at the lower part of the door lintel panel (10.1).
2. A downhole upstream water stop accident access door watertight lintel according to claim 1, wherein: a panel cross beam (10.5) is vertically welded on the door lintel panel (10.1); the door lintel panel (10.1), the water-jet preventing plate (10.4) and the panel cross beam (10.5) are connected into a whole by the rib plate (10.6) through three-side welding; or the rib plate (10.6) is used for connecting the door lintel panel (10.1), the bottom plate (10.7) and the panel cross beam (10.5) into a whole through three-side welding.
3. A downhole upstream water-stop emergency access door watertight lintel according to claim 1 or 2, wherein: a water-jet-proof reinforcing plate (10.3) is arranged between the door lintel panel (10.1) and the water-jet-proof plate (10.4).
4. A downhole upstream water stop accident access door watertight lintel according to claim 3, wherein: and a gap between the top end of the water jet preventing plate (10.4) and the accident access door (1) is reserved by about 2 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920320844.2U CN210031702U (en) | 2019-03-14 | 2019-03-14 | Down-the-hole type upstream water stop accident access door anti-water injection door head |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920320844.2U CN210031702U (en) | 2019-03-14 | 2019-03-14 | Down-the-hole type upstream water stop accident access door anti-water injection door head |
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| CN210031702U true CN210031702U (en) | 2020-02-07 |
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| CN201920320844.2U Active CN210031702U (en) | 2019-03-14 | 2019-03-14 | Down-the-hole type upstream water stop accident access door anti-water injection door head |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778791A (en) * | 2019-03-14 | 2019-05-21 | 长江勘测规划设计研究有限责任公司 | The anti-jetting lintel of down-the-hole type upstream sealing emergency overhaul gate |
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2019
- 2019-03-14 CN CN201920320844.2U patent/CN210031702U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778791A (en) * | 2019-03-14 | 2019-05-21 | 长江勘测规划设计研究有限责任公司 | The anti-jetting lintel of down-the-hole type upstream sealing emergency overhaul gate |
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